Ti₃C₂T_x MXene embedded metal–organic framework-based porous electrospun carbon nanofibers as a freestanding electrode for supercapacitors

Abstract

Ti3C2Tx MXene-integrated porous carbon nanofiber freestanding/flexible electrodes are engineered and the optimized MX-5@PCNF is used for the fabrication of flexible symmetric and asymmetric supercapacitor devices with high energy density.

Cobalt–Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes

“…A sharp and broad peak at 7° arising from the (002) plane is detected from the etched MXene, indicating a larger interlayer spacing and smaller layer thickness due to selective etching of Al in Ti 3 AlC 2 MAX . The disappearance of the (104) peak at 38.8° from Ti 3 AlC 2 corroborates the etching of Al . Subsequently, the MXene/PAN electrospun membrane is preoxidized and carbonized to produce MX-CNF, and the straight shape of the preoxidized MXene/PAN nanofiber is maintained (Figure S3).…”

“…The two-dimensional layered metal carbide, titanium carbide also known as MXene (MX), is promising in electrochemical energy storage applications due to its hydrophilicity, high conductivity (∼15,000 S cm –1 ), and good mechanical properties. − It has been employed to enhance the electrochemical performance of metal hydroxides. For example, Huang et al have anchored the NiFe-LDH arrays on Ti 3 C 2 T x -MXene sheets to improve the structural stability, conductivity, and redox kinetics .…”

Capacitive properties of carbon nanofibers derived from blends of cellulose acetate and polyacrylonitrile

“…20,21 Therefore, nanofibers obtained via electrospinning are considered to be one of the most promising precursors for CNFs. 22,23 Currently, the most used materials for electrospinning are fossil-based organic polymers, such as polyacrylonitrile, polyimide, polyvinyl alcohol, polyvinylpyrrolidone, phenolic resin and asphalt. [24][25][26][27] Among them, electrospun PAN fibers have favorable spinnability and a high carbon yield (50%), and are the most used precursors for the preparation of CNFs because of their excellent flexibility and fiber formation ability during the electrospinning and carbonization process.…”

“…20,21 Therefore, nanofibers obtained via electrospinning are considered to be one of the most promising precursors for CNFs. 22,23…”

Fabrication of Porous Reduced Graphene Oxide Encapsulated Cu(OH)2 Core–shell Structured Carbon Fiber-Based Electrodes for High-Performance Flexible Supercapacitors

“…EDLCs have a long cycle life but low specific capacitance. Pseudocapacitors present excellent specific capacitance and high energy density, but they are plagued by volume changes during the extended charge/discharge process, posing an intractable problem . To further facilitate FSC commercialization and broaden their application range, the key research issue for developing high-performance flexible supercapacitors is to fabricate electrode materials with high specific capacity, high energy density, and satisfactory cycle stability. , To achieve these demands, one imperative strategy is to incorporate double-layer electrode materials into pseudocapacitive materials, growing or coating them on flexible substrates (such as graphene paper, carbon cloth, or metal foam) for full use of the synergistic effect, allowing for the attainment of high energy density without compromising power density. , …”